Publications

Peer-Reviewed Journal Articles and Conference Proceedings

• Toyokawa, W. Collective cognition and behaviour. Nat Hum Behav 7, 1612–1613 (2023). (doi: 10.1038/s41562-023-01683-w).

• Witt, A., Toyokawa, W., Lala, K., Gaissmaier, W., & Wu, C. M. (2023). Social learning with a grain of salt. In M. Goldwater, F. Anggoro, B. Hayes, & D. Ong (Eds.), Proceedings of the 45th Annual Conference of the Cognitive Science Society. Sydney, Australia: Cognitive Science Society. psyarxiv.com/c3fuq

• Toyokawa W, and Gaissmaier W. (2022) Conformist social learning leads to self-organised prevention against adverse bias in risky decision making. eLife, 11:e75308. (doi: 10.7554/eLife.75308) [Code: https://github.com/WataruToyokawa/ToyokawaGaissmaier2021] [Press release] [eLife digest] [Shiny App demo]

• Kameda T, Toyokawa W, and Tindale RS (2022) Information aggregation and collective intelligence beyond the wisdom of crowds. Nature Reviews Psychology. (doi: https://doi.org/10.1038/s44159-022-00054-y) [Read-only link]

• Laland KN, Toyokawa W and Oudman T. (2019) Animal Learning as a Source of Developmental Bias. Evolution and Development. (doi: https://doi.org/10.1111/ede.12311)

• Toyokawa W, Whalen A and Laland KN. (2019). Social learning strategies regulate the wisdom and madness of interactive crowds. Nature Human Behaviour, 3: 183-193. (doi: 10.1038/s41562-018-0518-x). [Free-access read-only link] [Press Release] [Behind the Paper] [Blog post on The Conversation][Interview at the Parsing Science Podcast] [Mathematica notebook archive]

• Kim H, Toyokawa W & Kameda T. (2019). How do we decide when (not) to free-ride? Risk tolerance predicts adaptation of cooperation levels in new settings. Evolution and Human Behavior, 40: 55-64. (doi:10.1016/j.evolhumbehav.2018.08.001)

• Muthukrishna M, Henrich J, Toyakawa W, Hamamura T, Kameda T, &  Heine S J. (2018). Overconfidence is Universal? Elicitation of Genuine Overconfidence (Ego) Method Reveals Systematic Differences Across Domain, Task Knowledge, and Incentives in Four Populations. PLoS ONE, 13(8): e0202288. (doi: 10.1371/journal.pone.0202288)  

• Toyokawa W. (2017). Scrounging by foragers can resolve the paradox of enrichment. Royal Society Open Science, 4: 160830. (doi:10.1098/rsos.160830)

• Toyokawa W, Saito Y and Kameda T. (2017). Individual differences in learning behaviours in humans: Asocial exploration tendency does not predict reliance on social learning. Evolution and Human Behavior, 38 (3): 325-333. (doi:10.1016/j.evolhumbehav.2016.11.001) 

• Gregory A. Bryant, Daniel M.T. Fessler, Riccardo Fusaroli, Edward Clint, Lene Aarøe, Coren L. Apicella, Michael Bang Petersen, Shaneikiah T. Bickham, Alexander Bolyanatz, Brenda Chavez, Delphine De Smet, Cinthya Díaz, Jana Fančovičová, Michal Fux, Paulina Giraldo-Perez, Anning Hu, Shanmukh V. Kamble, Tatsuya Kameda, Norman P. Li, Francesca R. Luberti, Pavol Prokop, Katinka Quintelier, Brooke A Scelza, Hyun Jung Shin, Montserrat Soler, Stefan Stieger, Toyokawa W (27th), Ellis A. van den Hende, Hugo Viciana-Asensio, Saliha Elif Yildizhan, Jose C. Yong, Tessa Yuditha, and Yi Zhou (2016). Detecting affiliation in co-laughter across 24 societies. Proceedings of the National Academy of Sciences, 113 (17), 4682-4687. (doi: 10.1073/pnas.1524993113)

• Toyokawa W, Kim H and Kameda T. (2014). Human collective intelligence under dual exploration-exploitation dilemmas. PLoS ONE 9(4): e95789. (doi: 10.1371/journal.pone.0095789)

• Toyokawa W and Kameda T. (2014). Experimental study on social learning and swarm intelligence effect in the 'exploration-exploitation dilemma'. [in Japanese: “探索と収穫のジレンマ”における社会的学習と集合知効果の実験的検討 . 北海道心理学研究 第36号 1-14] [pdf]

• Toyokawa W and Kameda T. (2013). Toward a synthetic understanding of collective decision-making by humans and non-human animals. The Japanese Journal of Animal Psychology, 63, 2, 107-122. [in Japanese: ヒトと動物の「集団意思決定」をつなぐ. 動物心理学研究 第63巻 第2号 107-122][J-STAGE]

• Kameda T, Wisdom T, Toyokawa W and Inukai K. (2012). Is consensus-seeking unique to humans? A selective review of animal group decision-making and its implications for (human) social psychology. Group Processes & Intergroup Relations, 15, 673-689. (doi: 10.1177/1368430212451863)

Book Chapters

• Laland, K., Oudman, T., & Toyokawa, W. (2022). How Learning Affects Evolution. In M. Krause, K. Hollis, & M. Papini (Eds.), Evolution of Learning and Memory Mechanisms (pp. 265-282). Cambridge: Cambridge University Press.(doi: 10.1017/9781108768450)

• 豊川 航（2015）人間と動物の集団意思決定（亀田達也 (編著)「 "社会の決まり” はどのように決まるか」フロンティア実験社会科学, 第6巻 第5章, 勁草書房）

• Kameda, T, Inukai, K, Wisdom, T & Toyokawa, W (2015). Herd behavior: Its psychological and neural underpinnings. In S. Grundmann, F. Moeslein & K. Riesenhuber (Eds.), Contract governance. (Pp. 61-71). Oxford, UK: Oxford University Press.

Other writings

• What smart bees can teach humans about collective intelligence. The Conversation, 29 January 2019

• How do humans make decisions as a crowd? Disentangling group dynamics through computational cognitive modelling. Behind the Paper, 21 January 2019

• 比較グループ・ダイナミクスを目指して, 社会心理学会会報, 第201号 (2014. 3月)

Peer Reviewed Conference Proceedings

• Toyokawa W, Kim H and Kameda T. (2014). Less-is-more in a 5-star rating system: an experimental study of human combined decisions in a multi-armed bandit problem. Proceedings of Collective Intelligence 2014, June 10-12 at MIT.

Invited talks

1. TBA - Keynote talk at an EHBEA2020 satellite meeting "Strategic Social Learning". Krakow, Poland, 1 April 2020

2. "Collective intelligence, madness, and rescue by social reinforcement learning". Hosted by Professor Richard McElreath and Dominik Deffner, Department of Human Behavior, Ecology and Culture at Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany, 7 January 2020

3. "Social learning can shape collective behaviour and population dynamics". Hosted by Dr Ralf Karvers, Max Planck Institute for Human Development, Berlin, Germany, 9 November 2017

4. "Swarm intelligence and Maladaptive herding in human combined decisions". Hosted by Dr Alex Mesoudi, University of Exeter, Cornwall, UK, 7 September 2017

5. "Human social learning strategies in reinforcement learning tasks". Hosted by Dr Hisashi Ohtsuki, SOKENDAI, Hayama, Japan, 7 June 2017

6. Wataru Toyokawa, "Can humans show swarm intelligence through word-of-mouth?" (Japanese: '口コミの伝達は集合知を生み出すか'). The 7th Inuyama Comparative Social Cognition Symposium, Primate Research Institute, Kyoto University, Inuyama, March 25, 2012.

Presentations at international conferences

2023

1. Toyokawa, W  Cumulative evolution of risky technologies. EHBEA2023, April, London [talk]

2. Xi, JG, & Toyokawa, W The wisdom and madness of interactive crowds with a structured network. EHBEA2023, April, London [talk]

2022

1. Heißler EM, & Toyokawa, W Dynamics of risk regulates cooperation in an incomplete-information game with bandit payoff feedback EHBEA2022, April, Leipzig (online) [talk]

2021

1. Toyokawa, W Collective behavioural rescue: Conformity promotes adaptive behavioural shift in risky decision making. EHBEA2021, 27 March, Krakow (online) [talk]

2019

1. Collective decision-making in a multi-player multi-armed bandit. ASAB Summer Meeting, Konstanz, August 2019. [poster]

2. Social learning strategies regulate the wisdom and madness of interactive crowds. ICPS2019, Paris, 7-9 March 2019 [poster]

2018

1. Social learning strategies and word-of-mouths regulate human collective intelligence. CBEN2018, Antwerp, 22-23 November 2018. [talk]

2017

1. Toyokawa, W. From social learning to collective human behaviour. Inaugural Meeting of the Cultural Evolution Society, Jena, Germany, 14 September. [5 mins talk]

2016

1. Wataru Toyokawa. Social foraging can resolve the paradox of enrichment. British Ecological Society Annual Meeting 2016, Liverpool 11-14 December. [poster][Up-Goer Five]

2. Wataru Toyokawa, Andrew Whalen, Kevin N Laland. Independence and interdependence in human social learning. ICP2016, Yokohama 24-29 July. [talk] 

3. Wataru Toyokawa, Yoshimatsu Saito, Tatsuya Kameda. Asocial learning performance, but not exploration tendency, predicts the decrease of social learning use in humans. EHBEA2016, London 5-8 April. [talk]

2015

1. Wataru Toyokawa. Advice sharing and collective intelligence under exploration-exploitation trade-off in humans. SWARM 2015, October 28-30 at Kyoto University. [poster]

2014

1. Wataru Toyokawa, Kim Hye-rin and Tatsuya Kameda. Less-is-more in a 5-star rating system: an experimental study of human combined decisions in a multi-armed bandit problem. Collective Intelligence 2014, June 10-12 at MIT. [poster]

2. Wataru Toyokawa and Tatsuya Kameda.  Herding and plasticity of combined decisions in an online 3-armed bandit game. European Human Behaviour and Evolution Association Annual Meeting 2014, April 6-9 at University of Bristol. [poster]

2013

1. Wataru Toyokawa, Kim Hye-rin and Tatsuya Kameda. Swarm intelligence in a multi-armed bandit task with word-of-mouth. European Human Behaviour and Evolution Association Annual Meeting 2013, March 24-27 at Amsterdam. [poster]

2012

1. Wataru Toyokawa and Tatsuya Kameda.  The function of social learning in a Multi-Armed Bandit: An experimental study of payoff biased transmission mediated by word-of-mouth. 24th annual meeting of the Human Behavior and Evolution Society. June 13-17 at University of New Mexico. [poster]

2011

1. Wataru Toyokawa, Tatsuya Kameda and Hye-rin Kim.  Can humans show “swarm intelligence” under uncertainty as do honey bees? 23rd annual meeting of the Human Behavior and Evolution Society. June 29- July 3 at Montpellier. [poster]